Steven Tyler's Fiancé: If He Cheats, I'll Cheat

Steven Tyler's fiancé told him if he ever cheated on her, she would cheat back on him.

Sounds harsh, but hey, its better than chopping off your dong and tossing it out of a moving car.

The aging rocker has recently confirmed speculation he is to wed Erin Brady, whom he's been dating for seven years. And Tyler is known for being promiscuous, but Brady warned when they first got together that she wouldn't tolerate his bad behavior.

Erin said: "I just said, 'Hey listen, if you play, I'm gonna play.' He didn't really like it when he was on the other side of that scenario."

I'm wondering how many times she had to explain this.

ERIN: If you have sex with someone else, so will I.

STEVEN: ...I'm just not getting it. Run it by me again?

Steven, 63, has been married twice. He admits he regrets the way he treated his exes, Cyrinda Foxe and Teresa Barrick.

He told Oprah Winfrey in her 'Final Chapter' show: "For all the divorces I've had, I hurt those girls deeply, and there was some behavior that I'm ashamed of and I shouldn't have done. I don't want to hurt anybody again..."

The singer also regrets the fact he "abandoned" Cynthia and their daughter Mia to go on tour. Tyler revealed, "My heart is still broken that I did that."

Despite that, Tyler still says he wants to "screw" every woman he meets. At this point, I think its safe to say Steven Tyler has a problem. He's starting to make Mick Jagger look like the Virgin Mary.

He said, "I'd like to go on a schtupping spree and screw every girl I see, that would want to have me, who wouldn't? But I don't. I want (Erin) for my own, and if that's gonna take that away from it, I don't do it."